What a strange contrast did this man's outward life present to his destructive, world-annihilating thoughts! In sooth, had the citizens of Konigsberg had the least presentiment of the full significance of his ideas, they would have felt a far more awful dread at the presence of this man than at the sight of an executioner, who can but kill the body. But the worthy folk saw in him nothing more than a Professor of Philosophy, and as he passed at his customary hour, they greeted him in a friendly manner and set their watches by him.